We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for 'bachmann trains'.

On30 WISEMAN MODEL SERVICES 1890s GILPIN STYLE BACHMANN SHAY CONVERSION KIT
On30 WISEMAN MODEL SERVICES 1890s GILPIN STYLE BACHMANN SHAY CONVERSION KIT
$119.95
Time Remaining: 11d 3h 41m
Buy It Now for only: $119.95
Spectrum On30 Freight Cars Billboard Reefer John Harvards Brewhouse
Spectrum On30 Freight Cars Billboard Reefer John Harvards Brewhouse
$53.97
Time Remaining: 29d 6h 49m
Buy It Now for only: $53.97
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
$276.45
Time Remaining: 32d 11h 50m
Buy It Now for only: $276.45
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
$45.16
Time Remaining: 32d 11h 52m
Buy It Now for only: $45.16

Other On30 Scale train items recently purchased through this site:

On30 WISEMAN MODEL SERVICES 1890s GILPIN STYLE BACHMANN SHAY CONVERSION KIT
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
Spectrum On30 Freight Cars Billboard Reefer John Harvards Brewhouse